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auth.go
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auth.go
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package common
import (
"encoding/json"
"fmt"
"strings"
"time"
"github.com/ArtalkJS/Artalk/internal/core"
"github.com/ArtalkJS/Artalk/internal/entity"
"github.com/gofiber/fiber/v2"
"github.com/golang-jwt/jwt"
)
// jwtCustomClaims are custom claims extending default ones.
// See https://github.com/golang-jwt/jwt for more examples
type jwtCustomClaims struct {
UserID uint `json:"user_id"`
jwt.StandardClaims
}
func LoginGetUserToken(user entity.User, key string, ttl int) (string, error) {
// Set custom claims
claims := &jwtCustomClaims{
UserID: user.ID,
StandardClaims: jwt.StandardClaims{
IssuedAt: time.Now().Unix(), // 签发时间
ExpiresAt: time.Now().Add(time.Second * time.Duration(ttl)).Unix(), // 过期时间
},
}
// Create token with claims
token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
// Generate encoded token and send it as response.
t, err := token.SignedString([]byte(key))
if err != nil {
return "", err
}
return t, nil
}
var ErrTokenNotProvided = fmt.Errorf("token not provided")
var ErrTokenUserNotFound = fmt.Errorf("user not found")
var ErrTokenInvalidFromDate = fmt.Errorf("token is invalid starting from a certain date")
func GetTokenByReq(c *fiber.Ctx) string {
token := c.Query("token")
if token == "" {
token = c.FormValue("token")
}
if token == "" {
token = c.Get(fiber.HeaderAuthorization)
token = strings.TrimPrefix(token, "Bearer ")
}
return token
}
func GetJwtDataByReq(app *core.App, c *fiber.Ctx) (jwtCustomClaims, error) {
token := GetTokenByReq(c)
if token == "" {
return jwtCustomClaims{}, ErrTokenNotProvided
}
jwt, err := jwt.Parse(token, func(t *jwt.Token) (interface{}, error) {
if t.Method.Alg() != "HS256" {
return nil, fmt.Errorf("unexpected jwt signing method=%v", t.Header["alg"])
}
return []byte(app.Conf().AppKey), nil // 密钥
})
if err != nil {
return jwtCustomClaims{}, err
}
claims := jwtCustomClaims{}
tmp, _ := json.Marshal(jwt.Claims)
_ = json.Unmarshal(tmp, &claims)
return claims, nil
}
func GetUserByReq(app *core.App, c *fiber.Ctx) (entity.User, error) {
claims, err := GetJwtDataByReq(app, c)
if err != nil {
return entity.User{}, err
}
user := app.Dao().FindUserByID(claims.UserID)
if user.IsEmpty() {
return entity.User{}, ErrTokenUserNotFound
}
// check tokenValidFrom
if user.TokenValidFrom.Valid && claims.IssuedAt < user.TokenValidFrom.Time.Unix() {
return entity.User{}, ErrTokenInvalidFromDate
}
return user, nil
}